archlinux-initrd-ssh-cryptsetup/initrd-ssh-cryptsetup.install

#!/bin/bash

post_install() {
    local dropbear_authorized_keys="/etc/dropbear/initrd.authorized_keys"
    local etc_dropbear=$(dirname "${dropbear_authorized_keys}")
    [ -d "${etc_dropbear}" ] || mkdir -p "${etc_dropbear}"
    [ -e "${dropbear_authorized_keys}" ] || touch "${dropbear_authorized_keys}"
    chmod 600 "${dropbear_authorized_keys}"

    cat <<EOF
    Add the SSH public key to '${dropbear_authorized_keys}'.
    Add the 'ip=' kernel command parameter to the bootloader configuration
    (see https://wiki.archlinux.org/index.php/Mkinitcpio#Using_net).
    In the 'HOOKS' section of '/etc/mkinitcpio.conf', add 'ssh-cryptsetup'
    before 'filesystems'. And rebuild the initramfs: 'mkinitcpio -p linux'
EOF
}

post_remove() {
    cat <<EOF
    Remove the 'ip=' kernel command parameter from the bootloader configuration.
    In the 'HOOKS' section of '/etc/mkinitcpio.conf', remove 'ssh-cryptsetup'.
    And rebuild the initramfs: 'mkinitcpio -p linux'
EOF
}

post_upgrade() {
    post_install
}